AlertDialog.Builder( this)
     .setMessage("Do you want coffee?")
     .setPositiveButton("yes") { _: DialogInterface, _: Int -> }
     .setNegativeButton("no") { _: DialogInterface, _: Int -> }
     .show()

package com.example.androidkotlinapp1

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.content.DialogInterface
import androidx.appcompat.app.AlertDialog

class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
          super.onCreate(savedInstanceState)
          setContentView(R.layout.activity_main)

          AlertDialog.Builder(this)
               .setMessage("Do you want coffee?")
               .setPositiveButton("yes") { _: DialogInterface, _: Int -> }
               .setNegativeButton("no") { _: DialogInterface, _: Int -> }
               .show()

     }
}